If you're unfortunate enough to have a job that requires charging 20 cell phones simultaneously and on the go, then you may want to have a look at this (or keep it away from your boss). The "PowerCube 600" is a portable generator that can churn out 600 watts of solar power.

"Portable," however, is a relative notion in this case: As Engadget notes, this thing weighs 2,000 pounds. So don't count on keeping it in the trunk of your Prius--it wouldn't fit anyway, at 72 x 124 x 50 inches.